import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        int n = in.nextInt();
        int max = 0;
        int count = 0;
        while (n != 0) {
            while ((n & 1) == 1 ) {
                count++;
                n >>= 1;
            }
            if (count > max) {
                max = count;
            }
            count = 0;
            n >>= 1;
        }
        System.out.println(max);
    }
}// 1111 0111